Over the whole planet, there will be a threefold increase in the average acidity of the oceans, which is unprecedented during the past 20 million years.

在整个地球，海洋平均酸度将增加三倍，这是在过去两千万年里从未发生过的。

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A beIow average w'ine containing noticeabIe deficiencies. such as excesslve acidity and tannin. an absence of flavor, or poseibly dirty aromas or fIavors.

低于一般水平的葡萄酒。具有较明显的缺陷。比如：酸过多。劣质的单宁种类和数量过多。风味口感匮乏。香气不足。

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The annual average value of rain acidity and frequency are both good in 1999 and 2000, but get worse subsequently.

1999年和2000年酸雨年均酸度及频率情况都较好，之后出现反弹；

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Scientists estimate that the average acidity of surface ocean waters worldwide is now about 30% higher than before the Industrial Revolution.

BBC: Arctic Ocean 'acidifying rapidly'